Check Main Circuit Coolant Level - AP20.30-P-2050T

Engine 139 in model 118, 177, 247 

Courtesy of MERCEDES-BENZ USA

Shown on engine 139 in model 177.053 

Shown on engine 139 in model 118.354 

Courtesy of MERCEDES-BENZ USA

Shown on engine 139 in model 118.354 

Courtesy of MERCEDES-BENZ USA

	Risk of injury  to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning  from swallowing coolant.	Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the overpressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses.	AS20.00-Z-0001-01A
Notice	Notes on coolant		AH20.00-P-2080-01KOA
	Check
1	Check coolant level in upper area of coolant expansion reservoir (2).	The coolant level at a coolant temperature > 20°C must reach exactly up to the marking (arrow A). If the coolant level matches the conditions, ↓ coolant level correct, check complete, no further operations steps necessary. If the coolant level does not match the conditions, ↓ correct coolant level in coolant expansion reservoir (2), continue with operation step 2.
	Remove
2	Unscrew the cap (1) of the coolant expansion reservoir (2).	Open cap (1) only at a coolant temperature of < 40°C. Coolant can otherwise escape.
	Check
3	Correct coolant level.	At coolant temperature and engine compartment temperature of 20°C, the coolant level must reach up to the marking (arrow B) in the coolant expansion reservoir (2). If the coolant level is too low, ↓ Check cooling system for leak tightness and coolant for antifreeze content.
		Coolant specifications After obtaining special order.	BB00.40-P-0310-01A
	Install
4	Seal coolant expansion reservoir (2) with cap (1).